Improvement in air-compressors



H. H. DAY.

Ar- Compressors.

Patented Nov. 11,1873.`A

INVENTOR.

UNITED STATES PATENT OEEIOE.

EOEAOE H. DAY, OE NEw YORK, N. Y.

IMPROVEMENT IN AIR-COMPRESSORS.

Specification forming part of Letters Patent No. 144,390, dated November 1l, 1873; application filed March 21, 1873.

To all whom t may concer-n.-

Be it known that I, HORACE H. DAY, of New York, N. Y., have invented an Air-Compressor, of which the following is a specification:

The nature of my invention consists in the manner of constructing the working cylinder ofair-compressors, and the agitation of water to carry olf the heat evolved by compressing a1r.

I know that water was used by Dr. Royce in his patent, 26th May, 1857, and has since been used by others; hence my invention is conned to my manner of using the water, and the construction of the cylinders of the compressor.

` To enable others to make and use my invention, I describe it as follows:

I cast my compressing cylinders with an outer and inner shell, and fasten or hold the two together by a brace extending from one end to the other, and this brace is made in form of a coil extending many times around the cylinder, and attached to and forming part of both the outer and inner shell.

Cold water being let in from an elevation or pumped in at one end will pass many times around the cylinder, in contact with it, and pass out at the lower end. Much agitation of the water will be produced in its passage; but for the best effect I further agitate the water, and break up the passing column by placing cross-bars extending from one side of this brace to the other; or lugs may be substituted for the crossbars. These lugs, extending crosswise in this water-channel, force all parts of the cold water into contact with the outside of the inner shell and the inside of the outer shell, the more effectually to conduct off the heat evolved by the condensation. By constructing the inner shell very thin, in combination with the braces and outer shell, I still retain the aggregate of strength and cool it more rapidly.

The following are references to the drawings forming part of this specification.

Figure A shows the cylinder withthe outer shell in section, and the inner shell and brace in elevation and section. Fig. B shows an end view of the compressing-cylinder with the head oif. The arrows indicate the line of the waterpassage.

l is the space in which the piston moves. 2 is the water-way, formed in the casting. 3 is the inner shell. 4 is the outer shell. 5 are the cross-bars and lugs. 6 is the spiral brace connecting the inner and outer shells, and forming the water-channel. All these are cast in one piece, or so united as to have equal strength or tightness of one piece.

In cylinders used to compress or work off compressed air and -similar aeriform bodies it is desirable to change the temperature either to heat Or to cool it; and many ways have been adopted, among which are double cylinders. These I do not claim. Neither do I claim a pipe passing round the cylinder.

I claim- The water-way, Fig. 2, the cross-bars or lugs, Fig. 5, the spiral brace or flanges, which con nect the outer and inner shell, in combination, when used in cylinders for compressing or working off air or other aeriforln bodies, the whole united and operated in the manner set forth.

HORACE H. DAY. Witnesses W. A. ROYCE, I. E. WHITNEY. 

